// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/android/important_file_writer_android.h"

#include <string>

#include "base/android/jni_string.h"
#include "base/files/important_file_writer.h"
#include "base/threading/thread_restrictions.h"
#include "jni/ImportantFileWriterAndroid_jni.h"

namespace base {
namespace android {

    static jboolean WriteFileAtomically(JNIEnv* env,
        const JavaParamRef<jclass>& /* clazz */,
        const JavaParamRef<jstring>& file_name,
        const JavaParamRef<jbyteArray>& data)
    {
        // This is called on the UI thread during shutdown to save tab data, so
        // needs to enable IO.
        base::ThreadRestrictions::ScopedAllowIO allow_io;
        std::string native_file_name;
        base::android::ConvertJavaStringToUTF8(env, file_name, &native_file_name);
        base::FilePath path(native_file_name);
        int data_length = env->GetArrayLength(data);
        jbyte* native_data = env->GetByteArrayElements(data, NULL);
        std::string native_data_string(reinterpret_cast<char*>(native_data),
            data_length);
        bool result = base::ImportantFileWriter::WriteFileAtomically(
            path, native_data_string);
        env->ReleaseByteArrayElements(data, native_data, JNI_ABORT);
        return result;
    }

    bool RegisterImportantFileWriterAndroid(JNIEnv* env)
    {
        return RegisterNativesImpl(env);
    }

} // namespace android
} // namespace base
